2026 ICD-10-CM Diagnosis Code L41Parapsoriasis

ICD-10-CM Codes›L00–L99›L40-L45›L41

ICD-10-CM L41
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L41 is a non-billable ICD-10-CM category code for parapsoriasis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as L41.0, L41.1, L41.3, and L41.4.

Code Identity

ICD-10-CM Code
L41
Billable Status
No — Non-Billable Category
Code Describes
Parapsoriasis
Chapter
L40-L45
Papulosquamous disorders

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL40-L45Papulosquamous disorders
CategoryL41Parapsoriasis
This CodeL41Parapsoriasis

Specific Coding for ParapsoriasisOverview

Non-specific codes like L41 require more characters. Use one of these billable codes instead:

  • Use L41.0 for Pityriasis lichenoides et varioliformis acuta

  • Use L41.1 for Pityriasis lichenoides chronica

  • Use L41.3 for Small plaque parapsoriasis

  • Use L41.4 for Large plaque parapsoriasis

  • Use L41.5 for Retiform parapsoriasis

  • Use L41.8 for Other parapsoriasis

  • Use L41.9 for Parapsoriasis, unspecified

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • poikiloderma vasculare atrophicans L94.5

Clinical InformationClinical

  • Parapsoriasis

    the term applied to a group of relatively uncommon inflammatory, maculopapular, scaly eruptions of unknown etiology and resistant to conventional treatment. eruptions are both psoriatic and lichenoid in appearance, but the diseases are distinct from psoriasis, lichen planus, or other recognized dermatoses. proposed nomenclature divides parapsoriasis into two distinct subgroups, pityriasis lichenoides and parapsoriasis en plaques (small- and large-plaque parapsoriasis).

  • Pityriasis Lichenoides

    a subgroup of parapsoriasis itself divided into acute and chronic forms. the acute form is characterized by the abrupt onset of a generalized, reddish-brown, maculopapular eruption. lesions may be vesicular, hemorrhagic, crusted, or necrotic. histologically the disease is characterized by epidermal necrolysis. the chronic form shows milder skin changes with necrosis.

  • Large Plaque Parapsoriasis|Parapsoriasis en Plaques

    a variant of parapsoriasis in which the plaques are large.

  • Parapsoriasis

    an inflammatory skin disorder of unknown etiology characterized by papules and plaques or scaly patches resembling psoriasis.

  • Parapsoriasis Lichenoides|Parapsoriasis Variegata|Poikiloderma Atrophicans Vasculare|Poikilodermic Parapsoriasis|Retiform Parapsoriasis

    a rare condition that stimulated chronic radiodermatitis. it is considered a variant of mycosis fungoides.

  • Small Plaque Parapsoriasis

    a variant of parapsoriasis in which the plaques are small.

Patient EducationClinical

Skin Conditions

Your skin is your body's largest organ. It covers the entire outside of your body. There are many ways that your skin protects your body and helps keep you healthy. For example, it:

The full article covers:

  • What does your skin do?
  • What problems and conditions can affect your skin?
  • How can I keep my skin healthy?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About L41Overview

Is L41 (Parapsoriasis) a billable code?

No. This is a category header that groups the codes for parapsoriasis, and headers cannot be submitted on claims. Claims for parapsoriasis need a more specific code from this category, such as L41.0, L41.1, and L41.3.